I made this table with all events so far so if you interested in previous events - have a look:
https://docs.google.com/spreadsheets...#gid=946821616
But to answer your question: there were 10 cruise events so far. 6 rewarded gem recipes, 2 rewarded appliances, 1 rewarded special character Lula the Dancer that drops coins, quick serves and gems, and 1 rewarded Rock'n'Roll Tv which was just a decoration!
I think that the pattern now is that we get cruise event with gem recipe reward and then cruise with appliance reward. This pattern was on for 4months! Before we were getting only gem recipes but I think S8 decided that it's a little too much gem recipes and introduced new main reward (appliance) :>
I personally don't mind new reward because it's boring for me to cook the same recipes over and over again. But I understand that as a newer player it would be better for you to have a lot more gem recipes! :>